Discuz! info: MySQL Query Error

Time: 2014-10-1 8:13pm
Script: /dz5/viewthread.php

SQL: SELECT t.tid, t.closed, t.dateline, t.special, t.lastpost AS lastthreadpost, f.*, ff.* , f.fid AS fid
FROM [Table]threads t
INNER JOIN [Table]forums f ON f.fid=t.fid
LEFT JOIN [Table]forumfields ff ON ff.fid=f.fid
WHERE t.tid='530' AND t.displayorder>='0' LIMIT 1
Error: Table './dz5/[Table]threads' is marked as crashed and should be repaired
Errno.: 145

Similar error report has beed dispatched to administrator before.